Utility enclosure apron

ABSTRACT

Precast utility enclosure aprons for buried utility enclosures that have an angled top surface to direct water, ice and debris away from the center of the apron and to limit damage to the apron and utility enclosure caused by impacts to the apron.

CROSS REFERENCE TO RELATED APPLICATIONS

This application is a continuation of application Ser. No. 15/603,247filed May 23, 2017, and claims benefit from U.S. Provisional ApplicationSer. No. 62/340,935 filed May 24, 2016 the contents of both are hereinincorporated by reference in their entirety.

BACKGROUND Field

The present disclosure relates generally to aprons for utilityenclosures and, more particularly, to precast aprons for buried utilityenclosures that have an angled top surface to direct water, ice anddebris away from the center of the apron and to limit damage to theapron and utility enclosure from impacts.

Description of the Related Art

Utility companies, such as water, electric, gas, and/or cable televisionutilities often use subterranean conduits and enclosures to delivertheir product to customers. For example, electrical utilities runelectrical wires through underground conduits and provide workman accessto such wires using buried utility enclosures that have covers at orslightly above grade. The utility enclosures can be buried in theground, or under roads or sidewalks. The tops of buried enclosures wheninstalled can often be subject to impact from equipment, such as lawnmowers. Replacing damaged enclosures is expensive. To protect buriedutility enclosures from impact damage, workmen installing theunderground enclosures often dig a trench or form around the top of theenclosure and pour a concrete platform that surrounds the enclosure andis flush with the top of the enclosure. However, returning to theworksite multiple times to dig a trench around the enclosure, pour theconcrete, allow the concrete to set, remove safety cones and otherequipment after the concrete sets, and to clean the overall worksite byleveling the grade and seeding bare soil, if necessary, takes time andincreases the cost to install each underground utility enclosure.

SUMMARY

The present disclosure provides embodiments of utility enclosure aprons.In one exemplary embodiment, the utility enclosure apron includes alooped member having a top surface, a bottom surface, an outer edgebetween the top surface and the bottom surface, a center opening and aninner edge between the top surface and the bottom surface around thecenter opening. The top surface is a tapered surface such that athickness of the inner edge is greater than a thickness of the outeredge.

The present disclosure also provides embodiments of utility enclosurekits. In one exemplary embodiment, the utility enclosure kit includes autility enclosure configured for underground installation, and a utilityenclosure apron configured to be positioned to surround a top surface ofthe utility enclosure. The utility enclosure apron includes a loopedmember having a top surface, a bottom surface, an outer edge between thetop surface and the bottom surface, a center opening and an inner edgebetween the top surface and the bottom surface around the centeropening. The top surface is a tapered surface such that a thickness ofthe inner edge is greater than a thickness of the outer edge. The centeropening is configured to fit around a top portion of the utilityenclosure.

The present disclosure provides embodiments of molds for fabricatingutility enclosure aprons. In one exemplary embodiment, the mold includesa tub and a frame. The tub includes a support member, a center rib and arecess. The support member has a ledge that extends around a perimeterof the support member and rests on the frame. The support member alsoincludes a wall used to form an outer edge of a utility enclosure apron.The center rib is used to form a hollow center of the utility enclosureapron and includes a wall used to form an inner edge of the utilityenclosure apron. The recess is located between the support member andthe center rib. The recess has a face used to form a top surface of theutility enclosure apron. The face is tapered so that a width of therecess is at its greatest at the wall of the center rib and so that awidth of the recess is narrower at the wall of the support member.

BRIEF DESCRIPTION OF THE DRAWINGS

A more complete appreciation of the present disclosure and many of theattendant advantages thereof will be readily obtained as the samebecomes better understood by reference to the following detaileddescription when considered in connection with the accompanyingdrawings, wherein:

FIG. 1 is a top perspective view of an exemplary embodiment of a precastutility enclosure apron according to the present disclosure positionedaround a utility enclosure buried in the ground;

FIG. 2 is a top perspective view with part of the soil removed to reveala cross-section of the utility enclosure apron of FIG. 1;

FIG. 3 is a side elevation view of the utility enclosure apron of FIG.1;

FIG. 4 is a top perspective view of the utility enclosure apron of FIG.1, illustrating a skid resistant surface formed as part of a top surfaceof the utility enclosure apron;

FIG. 5 is a bottom plan view of the utility enclosure apron of FIG. 4;

FIG. 6 is a bottom plan view of another exemplary embodiment of theutility enclosure apron according to the present disclosure;

FIG. 7 is a cross-sectional view of the utility enclosure apron of FIG.6 taken along line 7-7;

FIG. 8 is a cross-sectional view of the utility enclosure apron of FIG.6 taken along line 8-8;

FIG. 9 is a top perspective view of another exemplary embodiment of aprecast utility enclosure apron according to the present disclosurepositioned around a utility enclosure buried in the ground;

FIG. 10 is a top perspective view with part of the soil removed toreveal a cross-section of the utility enclosure apron of FIG. 9;

FIG. 11 is a side elevation view of the utility enclosure apron of FIG.9;

FIG. 12 is a top perspective view of the utility enclosure apron of FIG.9, illustrating a skid resistant surface formed as part of a top surfaceof the utility enclosure apron;

FIG. 13 is a bottom plan view of the utility enclosure apron of FIG. 9;

FIG. 14 is a top plan view of the utility enclosure apron of FIG. 9;

FIG. 15 is a cross-sectional view of the utility enclosure apron of FIG.14 taken along line 15-15;

FIG. 16 is a cross-sectional view of the utility enclosure apron of FIG.14 taken along line 16-16;

FIG. 17 is a top perspective view of another exemplary embodiment of aprecast utility enclosure apron according to the present disclosurepositioned around a utility enclosure buried in the ground;

FIG. 18 is a top perspective view with part of the soil removed toreveal a cross-section of the utility enclosure apron of FIG. 17;

FIG. 19 is a top perspective view of a portion of the utility enclosureapron of FIG. 17;

FIG. 20 is a cross-sectional view of the utility enclosure apron of FIG.17 taken along line 20-20;

FIG. 21 is a top perspective view of a mold for fabricating the utilityenclosure apron of the present disclosure;

FIG. 22 is a top plan view of the mold of FIG. 21;

FIG. 23 is a cross-sectional view of the mold of FIG. 21 taken alongline 23-23 of FIG. 22; and

FIG. 24 is a cross-sectional view of the mold of FIG. 21 with polymercement poured into the mold and filler members embedded in the polymercement.

DETAILED DESCRIPTION

Exemplary embodiments of the present disclosure may be provided asimprovements to utility enclosures by providing a precast utilityenclosure apron that allows for water, ice and debris runoff andprotects the utility enclosure apron and the utility enclosure fromimpacts, especially side impacts. According to one exemplary embodimentthe utility enclosure apron includes a looped member having a topsurface, a bottom surface, an outer edge between the top surface and thebottom surface, a center opening and an inner edge between the topsurface and the bottom surface around the center opening. The topsurface is a tapered surface such that a thickness of the inner edge isgreater than a thickness of the outer edge.

Exemplary embodiments of the present disclosure also provide molds forfabricating the utility enclosure aprons. According to one exemplaryembodiment the utility enclosure apron mold includes a tub and a frame.

In some embodiments, the utility enclosure apron described herein may befabricated from concrete, such as a durable, corrosive resistant, highstrength, low permeability concrete. An example of such a suitableconcrete is polymer concrete. In other embodiments and to increase thestrength of the utility enclosure apron, the apron may be fabricatedfrom concrete reinforced with fiberglass sheets embedded in the concretenear, for example, the top and bottom surfaces of the utility enclosureapron. In other embodiments, and to decrease the weight of the utilityenclosure apron, the apron may be fabricated from concrete or fiberglassreinforced concrete with lightweight filler members embedded in theapron.

Referring now to the figures, an exemplary embodiment of a utilityenclosure apron according to the present disclosure is shown anddescribed. For ease of description the utility enclosure apron may bereferred to herein as the “apron.” The apron 20 is a looped memberconfigured to fit around a perimeter of a top portion of a utilityenclosure 10 as shown in FIGS. 1 and 2. In this exemplary embodiment,the apron is a continuous loop. However, the loop may be a split loopthat is joined together as shown in FIGS. 17-21. The apron 20 serves anumber of purposes. For example, the apron 20 acts as a buffer betweenthe utility enclosure 10 and equipment that may impact the side of theutility enclosure, such as a lawn mower. As another example, the apron20 stabilizes the buried utility enclosure by minimizing disruption tothe soil around the utility enclosure.

Referring to FIGS. 3 and 4, the apron 20 has a top surface 22, a bottomsurface 24, an outer edge 26 between the top surface and the bottomsurface, a center opening 28 and an inner edge 30 around the center 28and between the top surface and the bottom surface. The top surface 22is angled or tapered, as seen in FIG. 3, sufficient to allow water, iceand debris to runoff the apron 20 away from the center 28. The slope ofthe top surface 22 may be in the range from about ½ of an inch to about6 inches, where the slope angle “α” may be between about 3 degrees andabout 15 degrees. As an example, the slope of the top surface 22 may be1 inch starting from the inner edge 30 and ending at the outer edge 26.Such a slope would generally equate to a slope angle “α” of about 6degrees. To achieve, for example, a 1-inch slope and maintain thestructural integrity of the apron, the thickness of the inner edge 30 ofthe apron 20 may be between about 2 inches and about 8 inches, and thethickness of the outer edge 26 of the apron 20 may be between about ½ ofan inch and about 7 inches. To illustrate, if the inner edge 30 of theapron 20 is about 3 inches thick, the outer edge 26 of the apron 20would be about 2 inches thick.

To facilitate easier opening of a utility enclosure cover (not shown),the inner edge 30 of the apron 20 may be angled, e.g., angle β, suchthat the center opening 28 is larger at the top surface 22 of the apron20 than the center opening at the bottom surface 24 of the apron. Theangle β, seen in FIG. 3, may be in the range of between about 1 degreeand about 6 degrees, and is preferably about 3 degrees.

Along the top surface 22 of the apron 20 is a skid resistant surface 32,shown in FIG. 4. The skid resistant surface 32 has a coefficient offriction that is in a range sufficient to limit slipping when, forexample, walking on or driving over the apron. As a non-limitingexample, the coefficient of friction may be greater than or equal toabout 0.5. The skid resistant surface 32 may be formed by fabricatingthe apron in a mold having a rough surface where the top surface 22 ofthe apron 20 is formed. In another exemplary embodiment, the skidresistant surface may be a coating, e.g., a textured epoxy polymercoating, applied to the top surface 22.

Embedded within the top surface of the apron 20 may be one or more liftinserts 36 used to facilitate the lifting of the apron 20 usingmachinery or lifting systems, such as pulley systems, when, for example,installing the apron around a utility enclosure or when removing anapron 20 previously installed around a utility enclosure. Threadedpulling eyes (not shown) can then be inserted into the lift inserts.

In some embodiments, the apron 20 may be fabricated from solid concrete.In other embodiments and to increase the strength of the apron 20, theapron may be fabricated from concrete reinforced with fiberglass sheets.The fiberglass sheets may be, for example, embedded within the concretenear the top surface 22 and the bottom surface 24 of the apron 20. Thetop perspective view of FIG. 4 and the bottom plan view of FIG. 6, showa solid apron 20 made from concrete or fiberglass reinforced concrete.In other embodiments, and to decrease the weight of the apron 20, theapron may be fabricated from concrete or fiberglass reinforced concretewith lightweight filler members 44, seen in FIGS. 7 and 8. Thelightweight filler members include, for example, foam pads, foam boards,balsa wood, etc. In the embodiment shown in FIGS. 7 and 8, thelightweight filler members are rigid foam pads or boards. The foam padsor boards may be made of a lightweight water resistant material.Examples of such lightweight water resistant materials include closedcell PVC foam boards, balsa wood, corrugated cardboard, cellulose board,fiberboard, etc. The bottom plan view of FIG. 5 shows an apron 20 havingstruts 40 forming filler member chambers 42 in which prefabricatedfiller members 44, seen in FIGS. 7 and 8, are placed, and then concreteis poured into the chambers 42 and over the filler members 44 embeddingthe filler members in the concrete. In another embodiment, the fillermembers can be formed by spraying or otherwise depositing a lightweightmaterial, such as PVC foam, balsa wood, cardboard, cellulose or fiberinto the chambers 42 which then hardens into the filler members 44, asshown in FIG. 8. In another embodiment, the filler members 44 may besecured within the filler member chambers 42 using for exampleadhesives, without filling the filler member chambers 42 with concrete.The number of filler member chambers 42 and the size of each fillermember chamber may vary depending upon the desired size of the apron,the desired weight of the apron, and the desired strength of the apron.For example, the filler members 44 may have a length L, seen in FIG. 5,ranging between about 8 inches and about 16 inches, a width W, seen inFIG. 7, ranging between about 8 inches and about 16 inches, and athickness T ranging between about ¼ of an inch and about 6 inches.

Preferably, the apron has a compressive strength ranging between about9,000 psi and about 15,000 psi, a flexural strength ranging betweenabout 3,000 psi and about 6,000 psi, a tensile strength ranging betweenabout 800 psi and about 1,100 psi, so that the apron 20 can withstandloads of up to about 22,500 lbs. and can withstand an impact of up toabout 52 Nm.

As noted above, the present disclosure also contemplates kits forproviding access to underground equipment, such as underground utilityequipment. The kit includes the utility enclosure 10 and the apron 20.An example of a utility enclosure 10, shown in FIGS. 1 and 2, includes abox 12 and a cover (not shown). The box 12 may be rectangular in shape,square in shape or circular in shape. In the embodiment shown, the box12 is rectangular in shape and includes a plurality of walls thatinclude one or more conduit or cable knock-outs. The walls may havevertical supporting members providing additional support to the walls. Arim 14 may extend around the box 12 along the top edge of the wallsforming an opening for the cover. The rim 14 may include a ledge 16 uponwhich the cover rests. The box 12 and cover may include a lockingmechanism to lock the cover to the box. The box and cover may be madefrom one or more of high density polyethylene (HDPE), concrete, etc.

Referring now to FIGS. 9-16, another exemplary embodiment of a utilityenclosure apron according to the present disclosure is shown anddescribed. In this exemplary embodiment, the utility enclosure 110includes a box 112 and a cover (not shown). The box 112 in thisexemplary embodiment is circular in shape. The apron 120 is also loopedmember, here a circular loop, configured to fit around a perimeter of atop portion of the box 112, as shown in FIGS. 9 and 10. In thisexemplary embodiment, the apron 120 is a continuous loop. The apron 120serves a number of purposes. For example, the apron 120 acts as a bufferbetween the utility enclosure 110 and equipment that may impact the sideof the utility enclosure, such as a lawn mower. As another example, theapron 120 stabilizes the buried utility enclosure by minimizingdisruption to the soil around the utility enclosure.

Referring to FIGS. 11 and 12, the apron 120 has a top surface 122, abottom surface 124, an outer edge 126 between the top surface and thebottom surface, a center opening 128 and an inner edge 130 around thecenter opening 128 and between the top surface and the bottom surface.The top surface 122 is angled or tapered, as seen in FIG. 11, sufficientto allow water, ice and debris to runoff the apron 120 away from thecenter opening 128. The slope of the top surface 122 may be in the rangefrom about ½ of an inch to about 6 inches, where the slope angle “α” maybe, for example, between about 3 degrees and about 15 degrees. As anexample, the slope of the top surface 122 may be 1 inch starting fromthe inner edge 130 and ending at the outer edge 126. Such a slope wouldgenerally equate to a slope angle “α” of about 6 degrees. To achieve,for example, a 1-inch slope and maintain the structural integrity of theapron, the thickness of the inner edge 130 of the apron 120 may bebetween about 2 inches and about 8 inches, and the thickness of theouter edge 126 of the apron 120 may be between about ½ of an inch andabout 7 inches. To illustrate, if the inner edge 130 of the apron 120 isabout 3 inches thick, the outer edge 126 of the apron 120 would be about2 inches thick.

To facilitate easier opening of a utility enclosure cover (not shown),the inner edge 130 of the apron 120 may be angled, e.g., angle β, suchthat the center opening 128 is larger at the top surface 122 of theapron 120 than the center opening at the bottom surface 124 of theapron. As a non-limiting example, the angle β, seen in FIG. 11, may bein the range of between about 1 degree and about 6 degrees, and ispreferably about 3 degrees.

Along the top surface 122 of the apron 120 is a skid resistant surface132, shown in FIG. 12. The skid resistant surface 132 has a coefficientof friction that is in a range sufficient to limit slipping when, forexample, walking on or driving over the apron. As a non-limitingexample, the coefficient of friction may be greater than or equal toabout 0.5. The skid resistant surface 132 may be formed by fabricatingthe apron in a mold having a rough surface where the top surface 122 ofthe apron 120 is formed. In another exemplary embodiment, the skidresistant surface may be a coating, e.g., a textured epoxy polymercoating, applied to the top surface 122.

Embedded within the top surface of the apron 120 may be one or more liftinserts 136 used to facilitate the lifting of the apron 120 usingmachinery or lifting systems, such as pulley systems, when, for example,installing the apron around a utility enclosure or when removing anapron 120 previously installed around a utility enclosure. Threadedpulling eyes (not shown) can then be inserted into the lift inserts.

In some embodiments, the apron 120 may be fabricated from solidconcrete. In other embodiments and to increase the strength of the apron120, the apron may be fabricated from concrete reinforced withfiberglass sheets. The fiberglass sheets may be, for example, embeddedwithin the concrete near the top surface 122 and the bottom surface 124of the apron 120. The top perspective view of FIG. 12 and the bottomplan view of FIG. 14 show a solid apron 120 made from concrete orfiberglass reinforced concrete. In other embodiments, and to decreasethe weight of the apron 120, the apron may be fabricated from concreteor fiberglass reinforced concrete with lightweight filler members 144,seen in FIGS. 10 and 15. The lightweight filler members include, forexample, foam pads, foam boards, balsa wood, etc. In the embodimentshown in FIGS. 10 and 15, the lightweight filler members are rigid foampads or boards. The foam pads or boards may be made of a lightweightwater resistant material. Examples of such lightweight water resistantmaterials include closed cell PVC foam boards, balsa wood, corrugatedcardboard, cellulose board, fiberboard, etc. The bottom plan view ofFIG. 13 shows an apron 120 having struts 140 forming filler memberchambers 142 in which prefabricated filler members 144, seen in FIG. 15,can be placed, and then concrete is poured into the chambers 142 andover the filler members 144 embedding the filler members in theconcrete. In another embodiment, the filler members can be formed byspraying or otherwise depositing a lightweight material, such as PVCfoam, balsa wood, cardboard, cellulose or fiber into the chambers 142which then hardens into the filler members 144. In another embodiment,the filler members 144 may be secured within the filler member chambers142 using for example adhesives, without filling the filler memberchambers 142 with concrete. The number of struts 140 and thus the numberof filler member chambers 142 and the size of each filler member chambermay vary depending upon the desired size of the apron, the desiredweight of the apron, and the desired strength of the apron. For example,the struts 140 may extend between the outer edge 126 and the inner edge130 and positioned radially at predefined intervals, as seen in FIG. 13.In the embodiment shown, the struts are positioned at 45 degreeintervals resulting in eight (8) filler member chambers 142, seen inFIG. 13. Due to the circular shape of the apron 120 in this exemplaryembodiment, the filler member chambers 142 are wedge like shapes with anouter arc length A₁ and an inner arc length A₂. The arc lengths aredefined by the number and position of the struts 140 and the radius ofthe circular apron. The thickness T₂ of the filler member chamber mayrange, for example, between about 0.25 inches and about 6 inches.

Preferably, the apron 120 has a compressive strength ranging betweenabout 9,000 psi and about 15,000 psi, a flexural strength rangingbetween about 3,000 psi and about 6,000 psi, a tensile strength rangingbetween about 800 psi and about 1,100 psi, so that the apron canwithstand loads of up to about 22,500 lbs. and can withstand an impactof up to about 52 Nm.

As noted above, the present disclosure also contemplates kits forproviding access to underground equipment, such as underground utilityequipment. In this exemplary embodiment, the kit includes the utilityenclosure 110 and the apron 120. An example of a utility enclosure 110,shown in FIGS. 9 and 10, includes a box 12 and a cover (not shown). Inthis exemplary embodiment, the box 112 is circular in shape and includesa continuous wall that may include one or more conduit or cableknock-outs. The wall may have vertical supporting members providingadditional support to the wall. A rim 114 may extend around the box 112along the top edge of the wall forming an opening for the cover. The rim114 may include a ledge 116 upon which the cover rests. The box 112 andcover may include a locking mechanism to lock the cover to the box. Thebox and cover may be made from one or more of high density polyethylene(HDPE), concrete, etc.

Referring now to FIGS. 17-21, another exemplary embodiment of the apronaccording to the present disclosure is shown. In this exemplaryembodiment, the utility enclosure 110 is the same as the utilityenclosure described above and for ease of description is not repeated.The apron 220 is also looped member, here a circular loop, configured tofit around a perimeter of a top portion of the box 212, as shown inFIGS. 17 and 18. The apron 220 is substantially similar to the apron120, except that the apron is a split apron having a first apron portion222 and a second apron portion 224. The first apron portion 222 has afirst end 222 a and a second end 222 b, and the second apron portion 224has a first end 224 a and a second end 224 b. In this exemplaryembodiment, the first end 222 a of the first apron portion 222 has anotch 226 and one or more inserts 228 embedded within the notch andaccessible from a top surface of the notch, as shown in FIG. 19. The oneor more inserts 228 are configured to receive a fastener, such as athreaded bolt, and are used to secure the first apron portion 222 to thesecond apron portion 224. The first end 224 a of the second apronportion 224 has a notched overhang 230 that mates with the notch 228 inthe first end 222 a of the first apron portion 222. The notched overhang230 includes one or more mounting apertures 232 used to secure the firstend 224 a of the second apron portion to the first end 222 a of thefirst apron portion 222. Preferably, the mounting apertures 232 arecountersunk so that fastener used to secure the apron portions togetheris recessed within the mounting aperture. The second end 222 b of thefirst apron portion 222 and the second end 224 b of the second apronportion 224 would be configured the same as the first apron portion 222.

To secure the first apron portion 222 to the second apron portion 224,the notch overhang 230 of the first end 224 a of the second end portion224 is mated with the first end 222 a of the first apron portion 222.One or more threaded bolts 234 and one or more corresponding washers 236are inserted into the one or more mounting apertures 232, as shown inFIG. 19, and the bolts extend through the notched overhang 230. Thebolts 234 are then threaded into the inserts 228 embedded in the notch226 in the first end 222 a of the first apron portion 222 and tightened,as seen in FIG. 20.

Similar to the embodiments of FIGS. 9-16, the apron 220 may befabricated from, for example, solid concrete, concrete reinforced withfiberglass sheets, concrete with lightweight filler members 144, orfiberglass reinforced concrete with lightweight filler members 144. Inembodiments where the filler members are used, the number of struts 140and thus the number of filler member chambers 142 and the size of eachfiller member chamber may vary depending upon the desired size of theapron portions, the desired weight of the apron portions, and thedesired strength of the apron portions, similar to that described above.

As noted above, the present disclosure also contemplates kits forproviding access to underground equipment, such as underground utilityequipment. In this exemplary embodiment, the kit includes the utilityenclosure 110 and the apron 220 described above.

Turning now to FIGS. 21-24, an exemplary embodiment of a mold 50 forfabricating the apron 20 of the present disclosure is shown. In thisembodiment, the mold is a top-down mold where the top surface 22 of theapron 20 is formed by the mold. The mold 50 has a tub 52 that restswithin a frame 70, seen in FIG. 21. The tub 52 has a support member 54,a recess 56 and a center rib 58. The support member 54 has a ledge 60,seen in FIG. 23, which extends around the perimeter of the supportmember 54. The ledge 60 is configured to rest on the frame 70, as seenin FIGS. 23 and 24. The support member 54 has a wall 62 that forms theouter edge 26 of the apron 20, seen in FIGS. 1 and 4. The center rib 58forms the center opening 28 of the apron 20 and includes a wall 64 thatforms the inner edge 30 of the apron 20. A face 56 a of the recess 56forms the top surface 22 of the apron 20. The face 56 a of the mold 50may be formed with a rough surface to impart the skid resistant surface32 on the top surface of the apron 20. As seen in FIG. 23, the face 56 aof the recess 56 is tapered so that the width of the recess is at itsgreatest at the wall 64 of the center rib 58, and so that the width ofthe recess is narrower at the wall 62 of the support member 54. Thetapered face 56 a of the recess 56 is tapered to form the tapered shapein the top surface 22 of the apron 20 that facilitates water, ice anddebris runoff. To create openings to fit the lift inserts 36 in theapron 20 described above, the center of the recess 56 may include one ormore plugs 66, seen in FIG. 22. In this exemplary embodiment of atop-down mold 50, once concrete is poured into the recess, a bull float,screed or trowel can be used to level the concrete relative to thesupport member 54 and center rib 58 to form the bottom surface 24 of theapron, which is typically flat. The mold 50 according to the presentdisclosure can be fabricated from a composite material that includes atooling gel coat surface, a tooling resin and chopped fiberglassstrands.

The frame 70 of the mold 50 can be made of any suitable materialsufficient to support the mold 50 and the weight of the concrete formingthe apron 20. For example, the frame can be made of hollow steel tubingor bars that may be square, rectangular or round in shape. In thisexemplary embodiment, the frame 70 includes a rectangular tub support 72that is secured to a grid shaped base 74, as shown.

To precast a concrete apron 20, concrete is poured into the recess 56 ofthe mold 50 until the concrete fills the recess. Excess concrete isremoved using a bull float, screed or trowel and the concrete is leveledrelative to the support member 54 and center rib 58 to form the bottomsurface 24 of the apron. The concrete is then allowed, for example, toset for about 0.25 hours at which time the apron can be removed from themold 50.

To precast a fiberglass reinforced concrete apron 20, a layer, e.g.,about ⅛ of an inch thick, of concrete is poured into the recess 56 ofthe mold 50. A fiberglass sheet is then laid on the concrete andadditional concrete is poured into the mold covering the fiberglasssheet until about a ⅛ inch remains before the recess is filled withconcrete. A second fiberglass sheet is then laid on the concrete andadditional concrete is poured into the mold 50 covering the fiberglasssheet until the concrete fills the recess 56. Excess concrete is removedusing a bull float, screed or trowel and the concrete is leveledrelative to the support member 54 and center rib 58 to form the bottomsurface 24 of the apron. The concrete is then allowed, for example, toset for about 0.25 hours at which time the apron can be removed from themold.

To precast a lightweight fiberglass reinforced concrete apron 20, alayer, e.g., about ⅛ of an inch thick, of concrete is poured into therecess 56 of the mold 50. A fiberglass sheet is then laid on theconcrete and additional concrete is poured into the mold covering thefiberglass sheet until about ⅛ of an inch remains before the recess isfilled with concrete. One or more filler members 44, e.g., one or morelightweight foam pads or blocks, are then positioned in the recess 56 onthe concrete. Additional concrete is poured into the recess until theconcrete covers the filler members and fills the recess 56. Excessconcrete is removed using a bull float, screed or trowel and theconcrete is leveled relative to the support member 54 and center rib 58to form the bottom surface 24 of the apron. The concrete is thenallowed, for example, to set for about 0.25 hours at which time theapron can be removed from the mold.

While the mold and method for fabricating the apron according to thepresent disclosure is shown and described with reference to apron shapeof FIG. 1, one skilled in the are would readily appreciate the type,configuration and size of a mold needed to fabricate the otherembodiments of the apron described herein and those also contemplated bythe present disclosure. Further, while illustrative embodiments of thepresent disclosure have been described and illustrated above, it shouldbe understood that these are exemplary of the disclosure and are not tobe considered as limiting. Additions, deletions, substitutions, andother modifications can be made without departing from the spirit orscope of the present disclosure. Accordingly, the present disclosure isnot to be considered as limited by the foregoing description.

What is claimed is:
 1. A utility enclosure apron comprising a loopedmember having a lightweight material encased within a concrete materialsuch that the lightweight material is surrounded on all sides by theconcrete material, the looped member having a top surface, a bottomsurface, an outer edge between the top surface and the bottom surface, acenter opening and an inner edge between the top surface and the bottomsurface around the center opening.
 2. The utility enclosure apronaccording to claim 1, wherein the lightweight material comprises alightweight foam.
 3. The utility enclosure apron according to claim 2,wherein the lightweight foam comprises a foam pad or a foam block. 4.The utility enclosure apron according to claim 1, wherein thelightweight filler material is encased within the looped member adjacentthe bottom surface.
 5. The utility enclosure apron according to claim 1,wherein the lightweight filler material is encased within the loopedmember along the entire looped member or partially along the loopedmember.
 6. The utility enclosure apron according to claim 1, wherein thetop surface is tapered from the inner edge to the outer edge.
 7. Theutility enclosure apron according to claim 6, wherein an angle of thetaper is between about 3 degrees and about 15 degrees.
 8. The utilityenclosure apron according to claim 1, wherein the concrete materialcomprises one of, solid concrete, polymer concrete or a polymer concretereinforced with fiberglass.
 9. A utility enclosure kit comprising: autility enclosure configured for underground installation; and a utilityenclosure apron configured to be positioned to surround a top surface ofthe utility enclosure, the apron including: a looped member having alightweight material encased within a concrete material such that thelightweight material is surrounded on all sides by the concretematerial, the looped member having a top surface, a bottom surface, anouter edge between the top surface and the bottom surface, a centeropening and an inner edge between the top surface and the bottom surfacearound the center opening.
 10. The utility enclosure kit according toclaim 9, wherein the lightweight material comprises a lightweight foam.11. The utility enclosure kit according to claim 10, wherein thelightweight foam comprises a foam pad or a foam block.
 12. The utilityenclosure kit according to claim 9, wherein the lightweight fillermaterial is encased within the looped member adjacent the bottomsurface.
 13. The utility enclosure kit according to claim 9, wherein thelightweight filler material is encased within the looped member alongthe entire looped member or partially along the looped member.
 14. Theutility enclosure kit according to claim 9, wherein the top surface istapered from the inner edge to the outer edge.
 15. The utility enclosurekit according to claim 14, wherein an angle of the taper is betweenabout 3 degrees and about 15 degrees.
 16. The utility enclosure kitaccording to claim 9, wherein the concrete material comprises one of,solid concrete, polymer concrete or a polymer concrete reinforced withfiberglass.
 17. A utility enclosure apron comprising a looped memberhaving a lightweight filler material encased within polymer concretereinforced with fiberglass so that the lightweight filler material issurrounded on all sides by the polymer concrete reinforced withfiberglass, the looped member having a top surface, a bottom surface, anouter edge between the top surface and the bottom surface, a centeropening and an inner edge between the top surface and the bottom surfacearound the center opening, the top surface being tapered from the inneredge to the outer edge.
 18. The utility enclosure apron according toclaim 17, wherein the lightweight filler material comprises alightweight foam.
 19. The utility enclosure apron according to claim 18,wherein the lightweight foam comprises a foam pad or a foam block. 20.The utility enclosure apron according to claim 17, wherein an angle ofthe taper is between about 3 degrees and about 15 degrees.